> On Fri, Jun 22, 2007 at 06:17:46PM -0300, Henrique de Moraes Holschuh wrote:> > On Fri, 22 Jun 2007, Carlo Wood wrote:> > > So far I found out that it's RAID only.> > > > If you change the IO schedulers, does it help?> > How do I do that?

Should show you the scheduler for all libata/scsi discs, and switch toanticipatory. It probably works for hd* as well, but I don't have anyaround to test.

I had ridiculous md raid performance (on resync) using cfq at least once.Unfortunately I never bothered trying to track it down, and I didn't checkthe throughput after the resync was done either. Also, I don't recall thekernel version, but it was either 2.6.18 or 2.6.20.

Since it is a very simple test...

-- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh-To unsubscribe from this list: send the line "unsubscribe linux-kernel" inthe body of a message to majordomo@vger.kernel.orgMore majordomo info at http://vger.kernel.org/majordomo-info.htmlPlease read the FAQ at http://www.tux.org/lkml/